Damper-regulator.



N.&

DAMPER APPLICATION FILED MAR. 30, 191,1.

GOPLEY.

REGULATOR.

NoIBEnro e. cornnmlor FosrronIA, omo.

413.4111111iirannefunnroa.

aesinet.,

To all whom t may concern:

Be it known that I, Nomnn'ro G.' COPLEY,

`a citizen ofthe United; States, residing lat Fostoria, in the county of Seneca and State of Ohio, have invented a certain new and useful Improvement in Damper-Regulators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relaties to automatic damper0 regulators for -steam boilers Whereby the amount of draft permitted .to the fire is dependent upon the steam pressure, being increased as the pressure falls and decreased as the pressure increases. Devices of this type have long been in use in steam boilers used for heating' systems, and to -a limited extent in `power plants, but the yprevious devices with which I am .familiar have been unsatisfactory, either because of their too great complexity, their-lack of sensitiveness, or their failure to operate.

The object of this invention is the provision of a device ofthe type mentioned of the very highest possible degree of sensitiveness and simplicity and of the smallest liability to get out of order or fail to operateas required.

Another object is to combine with the pressure-operated mechanism a pilot valve of eifective ty e, which shall be positive in its action, an shall operate with a speed and certainty not dependent upon the rapidity' of mot-ion of the pressure operated mechanism.

Generally speaking, the invention may be delined as consisting of the combination of elements embodied in the claims hereto annexed and illustrated in the drawing forming part hereof, which illustrates a steam boiler of conventional type provided with my improved draft regulator. The regulator is shown in side elevation, with certain parts of it in section.

Describing the parts by reference characters, 1 indicates the front plate of a boilersetting having fire doors 2 and draft dampers 3, the latter being hinged so as to be drawn upwardly b pullingthe chains Li--LL .llournaled upon t is plate is 'a horizontal rock shaft 5 provided with arms 6--6 to which the chains 4 4 are attached and hav- Specicationof LettersPatent. i ,Application :ned March so, 1911. `serial No. 617,850.

ing at one end theactuating arm 7 to which 1s attached the weight 8 which tends to :hold the shaft in a position .allowing the draft dampers to remain closed. To this'arm is Patented .masa-1912.

also connected alchain 9 ywhich passes overv pulleys 10 and is connected with my regulater, which may be located at any convenlent point in the engine room.

In the embodiment illustrated herein, my

damper regulator comprises a base plate 11.

having upon its upper surfacea vertical cylinder 12 and an annular upwardly extending flange 13 defining a saucer shaped recess 14. A circular flexible diaphragm v15 if-rubber, leather, thin metal, or other flexible material, is clamped upon the top of this flange by means of a dished cap 16, port-ions of said cap being cut away as at 17 to permit the pressure of the atmosphere to act upon the upper surface of the diaphragm. A U-sbaped pipe 18 communicates with the recess and is connected at its other end with the steam dome 19 of the boiler. The top of the capis provided with a -sleeve 20in which ismounted the slidable Stem 21, having at its lower end an enlarged head or plate 22 resting upon the diaphragm. Carried by the plate 11 is a bracket 25 to which is pivoted, as at .26, an elongated weight-arm 27 which carries at its farther end a pan 28 upon which are placed the weights 29. The upper end of the stem 21 is preferably beveled as at 30 and seated in a notch formed in the lower surface of the arm. Formed upon the upper surface of the plate 11 adjacent the arm 27 is a second bracket 31, which carries the pilot valve. This valve consists of atlat plate 32 secured to the side of the bracket v31 and spaced therefrom by means of a washer 33, and between said plate and washer a flexible diaphragm 34 is interposed. To the vcentral portion of this plate 1s secured a p ipe 35 communicating with the head 36 of the cylinder 12, and at each side of the pipe 35 other pipes 37 and 38 are attached. The pipe 37 is connected to a source of fiuid pressure su ply, such as a water main, a strainer 39 eing preferably interposed therein, and the pipe 38 is employed as a waste. Slidably mounted in the bracket 31opposite each of the .pipes 37 and 38 is a slidable plunger 40, each of which is varspring 43, the other arm of which is pivoted' at 44 to the weight arm 27.- This spring preferably has one or more complete loops 45 formed intermediately, as shown.

Inside` the cylinder 12 is mounted the snugly fitting piston 48 secured to the end of a piston. rod 49 which passes through a packing gland 50 carried by the cylinder head 36. The chain 9 is secured to the end of this piston rod in such a manner that when the piston is at the lowermost point of its travel, as illustrated, the dampers 3 are raised, and when the piston 48 is allowed to ascend the dampers are closed.

The operation of the device is as follows: The weights l29 are adjusted so as exactly to counterbalance the upward pressure upon the diaphragm 15 when 4the steam pressure is at the desired point. If now the steam pressure falls, the unbalanced effect of the weights 29 will 'cause the arm 27 to descend until it passes across the arm 41, at which time the spring 43 will be under maximum compression. Asl soon as the dead center is passed, the spring 43 will assert itself by throwing the arm 41 sharply upward into the position shown in the drawings, allowingthe water or other fluid to enter from the pipe 37 tothe pipe 35 and thence to the'cylinder 12, depressing the piston 48 and opening the dalnpers. A s soon as the steam ,pressure rises again to a point suiiicient to overbalance the weights, 29, thearm 27 is raised past the arm 41, whereupon the spring 43 throws the latter arm'sharply downward, closing the communication' between the pipe 37 and the pipe 35 and opening communication between pipes 35 and 38. The weight 8 now rocks the shaft 5, permitting the' dampers to close and drawing the piston 48 toward the top of the cylinder, the fluid being discharged from the cylinder byway of pipes 35 and 38.

It will be seen that the rapidit-y with which the pilot valve is actuated depends entirely upon the spring 43 an'd not upon the rapidity of movement of the arm 27, thus insuring a quick and positive actuation of the dampers. Furthermore, both the pipes 37 and 38 cannot be open at the same time, since this would require that the arm l41 be held in its central position, -which is totally impossible. In this way, leakage through the pilot valve and loss of water or other pressure fluid is prevented. The bent nature of the pipe 18 assures its being full of water at its lowest point, thus preventing the access of hot steam to .the diaphragm, which would tend to deteriorate 1t.

While I have described my invention in .communication bet-Ween said first detail, I do not propose to be limited to such details, except as the same may be positively included in the claims hereto annexed or may be rendered necessary by the prior state of the art.

Having thus described my invention, what I claim isf 1. A damper regulator for steam boiler:- comprising in combination, a cylinder having a piston therein adapted to be connected to a damper, a pilot valve having a pipe communicating with said cylinder, and havingoutlet and inlet pipes connected thereto, a weighted arm adapted to be raised and, lowered upon variations in the steam pressure, valve members adapted to close said inlet pipe and open said outlet pipe or viceversa, and a double acting spring operatively connecting said pilot valve membersI and said weightedarm.v l.

2. In a device of thecharacter described, the combination of a cylinder having a piston, a pipe connected to said cylinder for conducting actuating fluid to and from the same, a pilot valve with which said pipe communicates, inlet and outlet pipes communicating with said pilot valve, means for establishing communication between said first pipeand either of said last pipes and for'simultaneously cutting oft communicaV tion between said first pipe and the other of said last pipes, a member to be moved in reverse directions upon variations in tht` steam pressure above and below a predetermined point, and a double acting spring connecting said member and pilot valve foi suddenly operating said valve in ythe proper direction upon variations in the steam pressure.

3. A damper regulator for steam boilers comprising in combination, a cylinder having a piston therein adapted to be connected to a damper, a pipe connected to said cylinder for conducting actuating fluid toand from the same, an inlet and a discharge pipe, valve members adapted to establish ipe and either of said last pipes to the exc usion of the other of said last pipes, a tilt-able lever having an arm connected to each of said valve members and having an extended operating arm, a member adapted to be moved past saidarm upon variations in the steam pressure above a given point, a compression spring'pivoted to said arm and said member and adapted to tilt said arm in the opposite direction from the direction of movement of' said member.

4. A damper regulator for steam boilers comprising 1n combination, a cylinder having a piston therein adapted to be connected to a damper, a pipe connected to said cylinder for conducting actuating fluid to and from the same, an inlet and a discharge pipe, valve members adapted to establish communication between said rst pipe and either of said last pipes to the exclusion of the other of said last pipes, a tiltable lever having an arm connect-ed to each of said valve members and vhaving an extended operating arm, a diaphragm having one side in communication with the steam pressure, a` weighted arm operatively' connected to said' diaphragm and adapted to be moved past said arm upon variations in the steam pressure above and below a given point, a compression spring pivoted to said arm and said member and adapted to tilt said arm` the other of said last pipes, a tiltable lever4 pivoted intermediate of said valve members and having an arm connected to each of said valve members and also having an operating arm, a member adapted to be moved pastsaid operating arm upon variations in the steam pressure above and below apredetermined pressure, and. a compression spring pivoted bo said member and to said operating arm and adapted to 'tiltsaid arm in one direction or the other upon the movement of the pivotal points of said spring past eachl other.

6. A damper .regulator for steam boilers comprising, in combination, a cylinder having a piston therein adapted to be connected to a damper, a pipe communicating with said cylinder. for conducting actuating fluid to and from the same, a valve plate to which said pipe is connected, an inlet and a discharge pipe connected to said valve plate, a second valve plate spaced from said'first plate and having slidable valve members projecting therethrough and adapted to close the mouths of either of said last mentioned pipes, a lever pivoted between said valve members and having an arm connected to each of the Same whereby one valve member will be open when the other is closed, an operating arm carried by said lever, a member adapted to be moved past said operating arm upon a variation of the steam pressure above or below a predetermined pressure, and a spring connected to 4said member and to said operating armI and adapted to tilt said operating arm abruptly in one direction or the other and hold it firm in final positionupon the movement of the anchorage points of the spring past their posit-ion of nearest approach to each other. In testimony whereof, I-hereunto aiiix my signature in the presence of two Witnesses.

NOIBERTO G. l COPLEY.

`Witnesses:

ALBERT H. BATES, J. B. HULL. 

